Bar stool



FIG. 1 is a perspective view of my bar stool, showing my new design;

FIG. 2 is a left side elevational view thereof, the right side elevational view thereof being a mirror image thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a front view thereof; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a bar stool, as shown and described. 